We stayed at a Duplex with 6 people total. We must say it was quite disappointing. For example, the couch was dirty, furniture was broken or about to break, floor was broken on certain areas and the TV didn't work (TV turned on, but had no Internet connection or signal).

Although the staff were very helpful and nice, it was just not enough to compensate for the uncomfortable duplex.
The location however was quite nice, it was easy to go every where by taxi and even walking was good because it was centrally located.
For the money we paid it was alright value for money, however I'd have rather spent some baht extra for a nicer apartment.
if you're on a budget, book it. if you want a bit more comfort, book another apartment.